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ahoeben
Joined: 20 Jun 2008 Posts: 20
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Posted: Wed Feb 25, 2009 12:50 pm Post subject: Suggestion: expose potmeter on openservo connector |
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For a future revision of the open servo design, it might be a nice idea to expose the potmeter signal (POSITION) and the regulated power (VREG) on the external connector. There's a couple of spare GND pins that could be repurposed.
Two usage scenarios:
* externally monitoring the potmeter value
handy for debugging, or for systems where you want continuous feedback of the servo position but don't want to overcrowd the I2C bus.
* connecting an external potmeter
eg one of these 'babies':
http://servocity.com/html/spg755a_standard_rotation.html
Also interesting to connect two fixed resistors for endless servos.
Having VREG available might be interesting for other uses near the servo as well. |
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Holtsmark
Joined: 30 Oct 2008 Posts: 4
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Posted: Sat Feb 28, 2009 8:40 pm Post subject: |
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I second this suggestion.
My reason: Not all potentiometers will have the same cramped pin layout which is currently available on the V3, and the holes are far to small to solder in wires. We have found that one should not go below AWG 22 for automotive / rough / vibration-prone systems. There is no way I can connect AWG 22 directly to those holes. |
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ginge Site Admin
Joined: 14 Jan 2006 Posts: 1029 Location: Manchester, UK
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Posted: Wed Mar 04, 2009 7:09 pm Post subject: |
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Hi,
Not sure how many of the GND connection we can take away before we start to limit the amount of current we can shunt. I will do some calculations on this, but I think we should be okay there.
I agree that the holes are too small... This is something we will be addressing on the next revision of OpenServo. _________________ http://www.headfuzz.co.uk/
http://www.robotfuzz.co.uk/ |
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